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I think you guys are making this too complicated. To test the modules, just try one at a time. If they work seperately, it will give you an idea of where your at. It could be that they won't work in dual channel. Which is most likely a bad module anyway. You shouldn't ever have to mess with the BIOS regarding memory modules. Unless your setting the DRAM timing or something. I'm willing to bet you have a bad module.

Windows 7 Ultimate x64 ram 4GB 2GB only usable

Problem RAM (4GB RAM 2GB Usable) Windows 8.1 ProHello, I will try to put there my problem, sorry for my english tho.
So the problem I have is the RAM one, I mean I have 4 GB RAM installed, but only 2 GB 'usable'. I've done all things, like update BIOS, type msconfig, Boot, uncheck Maximum memory thing
but nothing works,I tried to swap RAM...

Hardware & Devices

Windows 7 Ultimate 64 bit, recognizes 4gb of ram, only 2.93gb usable.So, here's my problem, this computer used to run Windows XP 32bit with 4gb of ram installed, 2.93gb usable was understandable then because it was 32bit, now i'm using 7 ultimate 64 bit and it still gives 2.93gb usable.
http://i.imgur.com/SA9Ej.jpg <-- My resource manager, i added up all the ram...

Hardware & Devices

16GB DDR3 1866 installed. (7.97GB usable) 7 UltimateSo, i'm using 7 ultimate, and I've recently installed16GB of G.skill DDR 1866 mhz memory (2 8GB sticks). I've gone into the BIOS and manually set the speed to 1866, and the system is only showing about half of it as "usable" So the first thing I checked was of course the ram itself. I've reseatted...

Hardware & Devices

On Windows 7 64bit only 1.99 of usable ram?Hi,
I've just installed Windows 7 Professional today (64bit) and I noticed that it only shows and uses 1.99 GB of ram, it used to show that too in 32 bit which I've been using until today, but I wanted to have a little bit more of useful ram, but nothing.. What should I do, because you can see...

Performance & Maintenance

12 of 16gig usable windows 7 ultimateM5A99X EVO 990X This is my mobo Has most current updated Bio's
says 12 of 16 gigs usable it's Corsair vengance ram 3x4gig
any idea's on fixing and allowing all ram to be usable.

Hardware & Devices

4GB RAM Installed 3.5GB Usable x64 bit Windows 7I recently built a system with a Gigabyte 880GM-UD2H motherboard with an AMD Phenom II Black Edition processor. I installed 2x2GB Crucial Ballistix Ram cards. While looking at my system properties i noticed I only had 3.5GB of usable ram. If you could please shed some light on this issue it would...